Molded plastic fuel containers comprise a plastic, with a pair of sides and gently inclined, integral front and rear faces. An integral handle spanning the top of the body extends over and between front and rear faces. A channel-like trough is defined at the bottom, beneath spaced-apart bottom portions. The trough is configured to snugly receive a handle when units are stacked vertically. Front portions of the handles and each trough are wider than corresponding rears. When a handle mated to and seated within a trough during stacking, stability is increased because both lateral (i.e., side-to-side) movements and linear (i.e., forward and rearward) movements are resisted by the locking action of the mating process.